AU2012308417B2 - System and method for the production of gypsum board using starch pellets - Google Patents
System and method for the production of gypsum board using starch pellets Download PDFInfo
- Publication number
- AU2012308417B2 AU2012308417B2 AU2012308417A AU2012308417A AU2012308417B2 AU 2012308417 B2 AU2012308417 B2 AU 2012308417B2 AU 2012308417 A AU2012308417 A AU 2012308417A AU 2012308417 A AU2012308417 A AU 2012308417A AU 2012308417 B2 AU2012308417 B2 AU 2012308417B2
- Authority
- AU
- Australia
- Prior art keywords
- pellets
- starch
- gypsum
- board
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000008188 pellet Substances 0.000 title claims abstract description 113
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 75
- 239000010440 gypsum Substances 0.000 title claims abstract description 75
- 229920002472 Starch Polymers 0.000 title claims abstract description 65
- 235000019698 starch Nutrition 0.000 title claims abstract description 65
- 239000008107 starch Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 48
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims description 13
- 239000011800 void material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 8
- 239000011324 bead Substances 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- -1 stucco Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/326—Joining the preformed parts, e.g. to make flat or profiled sandwich laminates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/18—Plaster
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/42—Pore formers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1712—Indefinite or running length work
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Producing Shaped Articles From Materials (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/232,513 US8882943B2 (en) | 2011-09-14 | 2011-09-14 | System and method for the production of gypsum board using starch pellets |
| US13/232,513 | 2011-09-14 | ||
| PCT/US2012/055392 WO2013040340A1 (en) | 2011-09-14 | 2012-09-14 | System and method for the production of gypsum board using starch pellets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2012308417A1 AU2012308417A1 (en) | 2014-04-17 |
| AU2012308417B2 true AU2012308417B2 (en) | 2017-05-25 |
Family
ID=47828661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2012308417A Ceased AU2012308417B2 (en) | 2011-09-14 | 2012-09-14 | System and method for the production of gypsum board using starch pellets |
Country Status (20)
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11306028B2 (en) | 2005-06-09 | 2022-04-19 | United States Gypsum Company | Light weight gypsum board |
| US9802866B2 (en) | 2005-06-09 | 2017-10-31 | United States Gypsum Company | Light weight gypsum board |
| US8882943B2 (en) | 2011-09-14 | 2014-11-11 | Certainteed Gypsum, Inc. | System and method for the production of gypsum board using starch pellets |
| US10399899B2 (en) | 2012-10-23 | 2019-09-03 | United States Gypsum Company | Pregelatinized starch with mid-range viscosity, and product, slurry and methods related thereto |
| US9540810B2 (en) | 2012-10-23 | 2017-01-10 | United States Gypsum Company | Pregelatinized starch with mid-range viscosity, and product, slurry and methods related thereto |
| US9828441B2 (en) | 2012-10-23 | 2017-11-28 | United States Gypsum Company | Method of preparing pregelatinized, partially hydrolyzed starch and related methods and products |
| US9651500B2 (en) | 2013-06-24 | 2017-05-16 | Yoshino Gypsum Co., Ltd. | Sizing defect detection system and sizing defect detection method |
| CN105890340B (zh) * | 2016-04-26 | 2018-10-02 | 中国新型建材设计研究院 | 一种石膏板干燥机出板段用跟踪控制方法 |
| MX2021003837A (es) | 2020-04-02 | 2021-10-04 | Gold Bond Building Products Llc | Metodo de formacion de un panel de yeso que incluye una capa de almidon. |
| US12304871B2 (en) | 2021-01-13 | 2025-05-20 | Knauf Gips Kg | Open-celled gypsum core, gypsum acoustic panel, and method for making same |
| CA3204020A1 (en) * | 2021-01-13 | 2022-07-21 | Yijun SANG | Open-celled gypsum core, gypsum acoustic panel, and method for making same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1776325A (en) * | 1927-10-06 | 1930-09-23 | Gypsum Lime And Alabastine Can | Method of making cellular wall board |
| US20050126437A1 (en) * | 2003-12-10 | 2005-06-16 | Innovative Construction And Building Materials, Llc | Organic-inorganic composite |
| US20080223258A1 (en) * | 2007-03-12 | 2008-09-18 | Robert Bruce | Method and System for Manufacturing Lightweight, High-Strength Gypsum Products |
| US20100075166A1 (en) * | 2008-09-24 | 2010-03-25 | Georgia Pacific | Compositions for the manufacture of gypsum boards, methods of manufacture thereof, and gypsum boards formed therefrom |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2158820C (en) | 1994-09-23 | 2004-11-23 | Steven W. Sucech | Producing foamed gypsum board |
| RU2172749C2 (ru) * | 1996-04-09 | 2001-08-27 | Е. Хашогги Индастриз, Эл-Эл-Си | Композиция для изготовления листа и связанный крахмалом лист (варианты) |
| AT406157B (de) * | 1998-09-07 | 2000-03-27 | B C D Rohstoffe Fuer Bauchemie | Verfahren zur herstellung von porenbildenden partikeln für beton oder mörtel |
| JP4152049B2 (ja) | 1999-12-22 | 2008-09-17 | 花王株式会社 | 粒子堆積体の製造方法 |
| US6524679B2 (en) | 2001-06-06 | 2003-02-25 | Bpb, Plc | Glass reinforced gypsum board |
| US6706128B2 (en) | 2001-06-22 | 2004-03-16 | National Gypsum Properties, Llc | Method of providing void space in gypsum wallboard and in a gypsum core composition |
| CN100457410C (zh) * | 2006-01-23 | 2009-02-04 | 山东泰和东新股份有限公司 | 利用脱硫石膏和磷石膏生产纸面石膏板的方法 |
| CN101549981A (zh) * | 2008-04-01 | 2009-10-07 | 北新集团建材股份有限公司 | 相变蓄能纸面石膏板及其制备方法 |
| US8882943B2 (en) | 2011-09-14 | 2014-11-11 | Certainteed Gypsum, Inc. | System and method for the production of gypsum board using starch pellets |
-
2011
- 2011-09-14 US US13/232,513 patent/US8882943B2/en active Active
-
2012
- 2012-09-14 ES ES12832128.8T patent/ES2667694T3/es active Active
- 2012-09-14 HR HRP20180677TT patent/HRP20180677T1/hr unknown
- 2012-09-14 CN CN201280045021.4A patent/CN103930257B/zh not_active Expired - Fee Related
- 2012-09-14 SI SI201231286T patent/SI2755812T1/en unknown
- 2012-09-14 BR BR112014005892A patent/BR112014005892A2/pt not_active Application Discontinuation
- 2012-09-14 PT PT128321288T patent/PT2755812T/pt unknown
- 2012-09-14 EP EP12832128.8A patent/EP2755812B1/en active Active
- 2012-09-14 IN IN2642CHN2014 patent/IN2014CN02642A/en unknown
- 2012-09-14 PL PL12832128T patent/PL2755812T3/pl unknown
- 2012-09-14 CA CA2848727A patent/CA2848727C/en active Active
- 2012-09-14 WO PCT/US2012/055392 patent/WO2013040340A1/en active Application Filing
- 2012-09-14 AU AU2012308417A patent/AU2012308417B2/en not_active Ceased
- 2012-09-14 MY MYPI2014700606A patent/MY175554A/en unknown
- 2012-09-14 DK DK12832128.8T patent/DK2755812T3/en active
- 2012-09-14 RU RU2014114389/03A patent/RU2603988C2/ru not_active IP Right Cessation
- 2012-09-14 HU HUE12832128A patent/HUE039367T2/hu unknown
- 2012-09-14 RS RS20180501A patent/RS57288B1/sr unknown
-
2013
- 2013-08-16 NO NO13750565A patent/NO2885079T3/no unknown
-
2014
- 2014-03-14 ZA ZA2014/01861A patent/ZA201401861B/en unknown
- 2014-11-10 US US14/537,646 patent/US9902656B2/en active Active
-
2017
- 2017-12-29 US US15/858,622 patent/US10532955B2/en active Active
-
2020
- 2020-01-14 US US16/742,691 patent/US11873259B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1776325A (en) * | 1927-10-06 | 1930-09-23 | Gypsum Lime And Alabastine Can | Method of making cellular wall board |
| US20050126437A1 (en) * | 2003-12-10 | 2005-06-16 | Innovative Construction And Building Materials, Llc | Organic-inorganic composite |
| US20080223258A1 (en) * | 2007-03-12 | 2008-09-18 | Robert Bruce | Method and System for Manufacturing Lightweight, High-Strength Gypsum Products |
| US20100075166A1 (en) * | 2008-09-24 | 2010-03-25 | Georgia Pacific | Compositions for the manufacture of gypsum boards, methods of manufacture thereof, and gypsum boards formed therefrom |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |